Telephone intercommunication set



FIG. 1 is a front, top, and right side perspective view of a telephone intercommunication set showing our new design;

FIG. 2 is a right side, partial top and rear perspective view thereof; and,

FIG. 3 is a bottom perspective view of the base, with a bottom perspective view of the handset spaced apart. 

The ornamental design for telephone intercommunication set, as shown and described. 